EP0381569B1 - Getreidetrockner und Anwendung dieses Trockners für die Trocknung von verschiedenen Getreidearten - Google Patents

Getreidetrockner und Anwendung dieses Trockners für die Trocknung von verschiedenen Getreidearten Download PDF

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Publication number
EP0381569B1
EP0381569B1 EP90400241A EP90400241A EP0381569B1 EP 0381569 B1 EP0381569 B1 EP 0381569B1 EP 90400241 A EP90400241 A EP 90400241A EP 90400241 A EP90400241 A EP 90400241A EP 0381569 B1 EP0381569 B1 EP 0381569B1
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EP
European Patent Office
Prior art keywords
air
column
compartment
chamber
hot air
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90400241A
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English (en)
French (fr)
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EP0381569A1 (de
Inventor
Claude Ghys
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COMIA-FAO SA
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COMIA-FAO SA
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Publication date
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Publication of EP0381569A1 publication Critical patent/EP0381569A1/de
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/12—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft
    • F26B17/14—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft the materials moving through a counter-current of gas
    • F26B17/1408—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft the materials moving through a counter-current of gas the gas being supplied and optionally extracted through ducts extending into the moving stack of material
    • F26B17/1416—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft the materials moving through a counter-current of gas the gas being supplied and optionally extracted through ducts extending into the moving stack of material the ducts being half open or perforated and arranged horizontally

Definitions

  • the present invention relates to a cereal dryer able to be used for drying cereals of different types.
  • the invention also relates to the use of this dryer for drying various cereals.
  • vertical driers are usually used, supplied with grain from above and in which the grain flows in mass, by gravity, and is crossed by a flow of hot air which rises in the drier, according to the technique of cross currents.
  • the drying column proper can be constituted by an enclosure comprising parallel walls having orifices for supplying hot air from lateral boxes, a gutter-shaped sheath the concavity of which faces downwards being associated with each orifice and extending to the opposite wall, on which it is fixed.
  • the hot air admitted to one end of these sheaths therefore escapes laterally over the entire length of these, while, simultaneously, the grain, which flows by gravity, meets these sheaths, which slow its progression and it impose changes of direction, so as to achieve a real mixing, conducive to uniform drying.
  • driers with two drying zones called “energy-saving" driers
  • the present invention is concerned with and it aims more particularly to propose a drier for cereals of this general type, which can be adapted in a simple and free way to the drying of cereals of different kinds, such as light seeds (wheat, rapeseed, oats, barley, sunflower or others) or heavier seeds (corn, peas) with variable humidity levels.
  • Another object of the invention is to propose a dryer of this type equipped with means making it possible to regulate in a simple manner the temperature of the different zones of the drying column in which the grain flows by gravity from top to bottom.
  • the means for entraining the used air through the recirculation ducts towards the base of the hot air box will preferably comprise a fan arranged at the base of the hot air compartment at a level such that it can simultaneously drive cold air crossing the base of the column and the used air passing through the recirculation ducts.
  • a system of partitions and movable shutters will be provided inside the hot air compartment in order to regulate the flow of cold air and possibly of used air which is mixed with hot air, and to adjust the temperature and the flow rate of the drying air supplying respectively the upper part and the lower part of the column.
  • temperature measurement probes will preferably be provided in different locations of the boxes and possibly of the column, in order to be able to adjust, preferably by a servo system, the position of the movable flap (s) arranged in the compartment d 'hot air.
  • the dryer shown in the drawings is of a type known per se. It includes a vertical drying column, 1, at the top of which is arranged a enclosure 2 for storing wet cereals, while at its base is provided an enclosure 3 for recovering dried cereals.
  • the grain flows by gravity from the enclosure 2 to the enclosure 3, encountering on its path drying sheaths 4, arranged transversely on the path of the cereals, thereby causing successive changes in the direction of the grain, so that 'it dries homogeneously.
  • a box of hot air 5 communicating at its base with the atmosphere through an opening 6 and comprising a burner 7 which heats the air entering through this opening.
  • the ducts 4 open into the hot air box through openings 26 (see Figures 3 and 4) while similar openings are provided in the opposite wall of the column 1, to put it in communication with a side box 8 of worn air.
  • This box 8 communicates at its upper part with the atmosphere through an opening 9, provided with shutters 10 for adjusting the flow rate and equipped with a fan 11.
  • a cold air box 12 Below the used air box 8 is a cold air box 12, separated from the box 8 by a sealed floor 13 and provided with an atmospheric air inlet 14.
  • ducts 15 for cooling the cereals arranged transversely to the base of the column, open through an opening in the cold air box 12 and communicate at their other end with a compartment 16 of the hot air box 5.
  • the air atmospheric introduced through the opening 14 thus passes through the base of the column 1 by cooling the dried cereals which are present, and it heats itself in contact with the cereals before entering the compartment 16 of the hot air box 5.
  • the hot air from this box crosses the column 2, escaping laterally from the ducts 4, thus ensuring the drying of the cereals and taking charge of humidity. He escapes then through the opposite wall in the spent air box 8, from which it is discharged to the atmosphere through the opening 9 and the fan 11.
  • a mobile waterproof floor 17 can be placed in various positions in the intermediate box 8 to divide it into two compartments which do not communicate with each other.
  • the floor 17 can, in a first position, be brought substantially to the base of the waste air compartment 8, above the fixed floor 13, to release the entire volume of the compartment 8.
  • the movable floor 17 is disposed immediately above recirculation ducts 28, which open into the compartment 8 above the floor 13 and which communicate with the compartment 16 through openings 29 in the wall of the column 1
  • movable flaps 18 are arranged inside the compartment 16 for adjusting the air flow and the compartment 16 communicates, by means of a fan 19, with a chimney 20 of the hot air compartment 5.
  • the chimneys 21 and 22 can communicate with each other at their upper end, but a movable shutter 25 for adjusting the flow is provided at the upper part of the chimney 20 to adjust the fraction of air flow entering directly into the chimney 23 and possibly to suppress any communication between the chimneys 20 and 23 (position shown in FIG. 1). Likewise, a movable shutter 26 for adjusting the flow rate is provided at the inlet of the chimney 23, for adjusting the relative flow rates of hot air entering the chimney 23 or supplying the upper part of the column 1.
  • the floor 17 can also be arranged at mid-height in the used air box 8, to divide this box into an upper compartment 8 a and into a lower compartment 8 b , which communicates via recirculation ducts 28 with compartment 16.
  • This position is that used for drying heavy cereals with high humidity, such as corn.
  • the fan 19 is actuated to force a recirculation of the waste air fraction which passes through the compartment 8b in the direction of the compartment 16, to recycle it to the chimney 20 and mix it with the hot gases coming from the burner 7, with a view to supplying the chimney 23 and the upper part of the column 1.
  • the flap 25 is open and makes it possible to adjust the proportions of heated recycled air which it is desired to direct towards the upper part and towards the lower part of the column.
  • the flap 26 makes it possible to adjust the flow of hot air supplying these two parts of the column.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)

Claims (6)

1. Getreidetrockner umfassend:
- eine vertikale Trocknungskolonne (1), in welcher das zu trocknede Getreide durch Schwerkraft von einem an der Spitze der Kolone angeordneten Raum (2) zur Lagerung von feuchtem Getreide zu einem an der Basis der Kolonne angeordneten Raum (3) zur Gewinnung von trockenem Getreide gelangt;
- einen ersten Behälter (12) oder Behälter für Kaltluft mit einem Eintritt für Umgebungsluft (14), welcher seitlich relativ zu einer Wand der Kolonne an der Basis derselben angeordnet ist;
- einen zweiten Behälter (8) oder Behälter für gebrauchte Luft, welcher in seinem oberen Bereich mit einer Öffnung (9) zum Ausbringen von Luft ausgebildet ist und vorzugsweise mit einem Ventilator (11) ausgestattet ist, wobei der zweite Behälter an derselben Seite der Trocknungskolonne oberhalb des Behälters für Kaltluft angeordnet ist und von diesem durch eine gasdichte Platte (13) getrennt ist;
- einen dritten Behälter oder Behälter (15) für Heißluft, welcher seitlich an einer der dem ersten und zweiten Behälter zugeordneten Wand gegenüberliegenden Wand angeordnet ist, wobei der dritte Behälter mit einem Eintritt (6) für Umgebungsluft ausgebildet ist und Mittel (7) zum Aufheizen der Luft, beispielsweise ein Brenner, vorgesehen sind;
- Einbauten (4,15), welche quer in der Trocknungskolonne zwischen dem Behälter (5) für Heißluft und den Behältern für Kaltluft (12) und gebrauchte Luft (8) verlaufen, wobei in dem zugeordneten Wanden der Kolonne an den Enden der Einbauten Öffnungen für eine Verbindung derselben mit den angrenzenden Behältern ausgebildet sind, dadurch gekennzeichnet,
   daß im Inneren des Behälters (8) für gebrauchte Luft eine entfernbare, gasdichte Platte (17) vorgesehen ist, die in einer Vielzahl von Positionen im Inneren des Raumes für eine Unterteilung desselben in zwei voneinander dicht getrennte Raume, u.zw. in einen unteren (8b) und einen oberen (8a) Raum, anordenbar ist, daß an der Basis der Kolonne (1) oberhalb des den Behälter für Kaltluft und den Behälter für Heißluft verbinden den Bereiches quer Einbauten (28) für eine Rezirkulation angeordnet sind, welche über Öffnungen mit der Basis des Raumes (8) für gebrauchte Luft und mit dem Raum (5) für Heißluft in Verbindung stehen, und daß gesteuerte Mittel, beispielsweise Ventilatoren (19), vorgesehen sind, welche für eine Mitnahme der gebrauchten Luft des unteren Teiles des Raumes (8) für gebrauchte Luft über die Einbauten (28) zur Rezirkulation zum Behälter (5) für Heißluft geeignet sind.
2. Trockner nach Anspruch 1, dadurch gekennzeichnet, daß der Raum (5) für Heißluft ein System von Zwischenwänden (20,21,22,23) und bewegbaren Klappen (25,26) zur Regelung der Gasmenge umfaßt, um die Menge und die Temperatur des Gases einzustellen, welches dem oberen und unteren Bereich der Trockner kolonne (1) zugeführt wird.
3. Trockner nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß die Mittel zur Mitnahme der gebrauchten Luft zum Behälter (5) für Heißluft über die Einbauten (28) zur Rezirkulation einen ventilator (19) umfassen, welcher an der Basis des Behälters (5) für Heißluft in einer Position angeordnet ist, so daß der gleichzeitig gebrauchte rezyklierte Luft und in den Behälter (12) für Kaltluft zugeführte Luft mitnehmen kann.
4. Trockner nach einem der Ansprüche 2 oder 3, dadurch gekennzeichnet, daß er Sonden für die Temperatur umfaßt, welche gegebenenfalls mit Steuermitteln verbunden sind, um die Position der bewegbaren Klappen (25,26) zur Regelung der Mengen unterschiedlicher Gase einzustellen.
5. Verwendung eines Trockners nach einem der Ansprüche 1 bis 4, zur Trocknung von leichtem Getreide, wie beispielsweise Weizen, Raps od.dgl., dadurch gekennzeichnet, daß die bewegbare Platte (17) in der unteren Position im Behälter (8) für gebrauchte Luft angeordnet ist und eine jegliche Verbindung zwischen diesem Raum und dem Raum (5) für Heißluft über die Einbauten (28) zur Rezirkulation verhindert.
6. Verwendung des Trockners nach einem der Ansprüche 1 bis 4, zur Trocknung von Getreide, wie beispielsweise Mais, dadurch gekennzeichnet, daß die bewegbare Platte (17) in einer Zwischenposition zwischen der Basis und dem Oberteil des Behälters (8) für gebrauchte Luft angeordnet ist, so daß der untere Raum (8b) des Behälters mit dem Raum (5) für Heißluft unter Zwischenschaltung der Einbauten (28) zur Rezirkulation in Verbindung steht.
EP90400241A 1989-01-31 1990-01-29 Getreidetrockner und Anwendung dieses Trockners für die Trocknung von verschiedenen Getreidearten Expired - Lifetime EP0381569B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8901191A FR2642261B1 (fr) 1989-01-31 1989-01-31 Sechoir pour cereales et utilisation de ce sechoir pour le sechage de cereales de types differents
FR8901191 1989-01-31

Publications (2)

Publication Number Publication Date
EP0381569A1 EP0381569A1 (de) 1990-08-08
EP0381569B1 true EP0381569B1 (de) 1992-03-18

Family

ID=9378303

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Application Number Title Priority Date Filing Date
EP90400241A Expired - Lifetime EP0381569B1 (de) 1989-01-31 1990-01-29 Getreidetrockner und Anwendung dieses Trockners für die Trocknung von verschiedenen Getreidearten

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EP (1) EP0381569B1 (de)
AT (1) ATE73922T1 (de)
DE (1) DE69000035D1 (de)
DK (1) DK0381569T3 (de)
ES (1) ES2029754T3 (de)
FR (1) FR2642261B1 (de)
GR (1) GR3004098T3 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10334759B2 (en) * 2013-11-26 2019-06-25 Panduit Corp. Universal inlet duct system for side air intake equipment
CN104770149B (zh) * 2015-03-31 2016-09-07 绵阳华西仓储服务有限公司 便于保持室内干燥的墙面通风装置
US11015867B2 (en) * 2016-11-02 2021-05-25 Hedinn Hf. Combined cooker and dryer device

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR591664A (fr) * 1924-08-14 1925-07-16 Perfectionnements dans les machines à conditionner les grains
FR821091A (fr) * 1937-01-30 1937-11-26 Thomas Robinson & Son Ltd Perfectionnements aux machines de séchage et de conditionnement pour céréales
FR1187735A (fr) * 1957-04-24 1959-09-15 Linde Maskiner Ab Installation de séchage notamment silo à grains
SE319128B (de) * 1968-09-24 1969-12-22 Svenska Flaektfabriken Ab
FR2480920A2 (fr) * 1980-04-16 1981-10-23 Comia Fao Sa Sechoir a cereales perfectionne
HU183005B (en) * 1981-10-21 1983-12-28 Oktober 6 Mtsz Method and apparatus for energy spare drying of constant output particularly granular products or produces containing surface and fixed moisture
DD206204A1 (de) * 1982-05-17 1984-01-18 Maelzerei Und Speicherbau Erfu Verfahren und einrichtung zum trocknen von rieselfaehigem gut

Also Published As

Publication number Publication date
FR2642261A1 (fr) 1990-08-03
DE69000035D1 (de) 1992-04-23
DK0381569T3 (da) 1992-04-21
ES2029754T3 (es) 1992-09-01
GR3004098T3 (de) 1993-03-31
FR2642261B1 (fr) 1991-05-10
ATE73922T1 (de) 1992-04-15
EP0381569A1 (de) 1990-08-08

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